Talk about bright shiny faces, Euonymus 'Happiness' can't get much brighter with its blazing yellow foliage that tops older, dark green growth. This plant stays around two feet tall and has smaller leaves than some other varieties of euonymus, so it works well in container planters, hanging baskets, and in borders, rock gardens, or woodland gardens. 'Happiness' euonymus is easy to maintain, and indeed provides year-round happiness.